Gas-compressor.



PATENTED JAN. 30, 1906.

1 L. STBRNB. GAS COMPRESSOR. APPLICATION FILED AUG. 8. 1904.

lunrrnn strrrrns Louis STlHNE, on

nrnn r ori non Lennon, ENGLAN'Il no. timer.

Specification of Letters Patent.

racemes Jim. so, ieccl Applicntion filed August 18,1904 fiarisl No- 221,279.

a, side elevation of such a ges-compressor, em.-

' cornynessor on c. suitable hed'.

hod ing the invention in whet is considered the est mode of applying the principle'thereoi. Fig. 2 is a. central horizontal section of the Fig. 3 is e cross-section on line 3 3 of Fig. 2. Fig. 4; is a longitudinol section, on u larger scale, of one oi. the vnlved pistons of said compressor; and Fig. 5 is a hm, on a smaller scale, of the compressor, inc uding an operating cross-head not shown in Figs. 1 end 2. l

The central portion oi the compressor consists of o gas-tight casing A, provided witho return-gas inlet Al for the reception of the cold gaseous ammonia to be compressed. At opposite ends of this casing and interconnected thereby are two compressor-cylinders A B, closed at their outer ends only, their respective open ends being turned lIlWlllCl, or, in other WOldS, toward the center of sold casing A. The cylinders are errenged ten dem---thut is to say, in line with each other. Most sdvuntugcously the adjacent inner ends of the cylinders ore interconnected by iornilog the cylinder A inte rel with ssid casing and securing the cylin er B to the letter by means of the annular head B, as shown in Fig. On the casing A, are shown en tended lest, Figs. 1 and 3, for sun orting the 0t shown) At the outer end of each cylinder is a, de livery-valve, which is most advantageously pieced in on enlargement A B, respectively,

oi: he corresponding cylinder end is most udventsgeously composed of e stout plete G, and c, cylindrical extension or body G, which lite over and is guided by the annular lip A, on the cyliiuler-hecd A. l-loused within. this lip A is so helieol spring I, which abuts 'c uinst the plots A and urges the valve G l of its sent. Apertures g in the valve-body (2 cqmiliuc the pressures inside ond outside oi" the valve.

. hlvmsclred iston D most adverb,

tsgeou'sly u hollow or trunk piston, as shown) works in each cylinder and is provided with e suction-vclvewhich is most advantageously composed oi o heed l3 and a, hollow cylin dricol body it, attached thereto, with spur tures 6 near "the junction. The valve-body E fits within. and is guided by the piston, which is apertured to allow the as from the casing A to flow to and through the valve.

self in u recess in the end of the piston when the vulve closes. This is drawn to its seat by the aid of a helical spring F, surrounding; the velvcdiody l3 and interposed between ring E on the valve. A flange .llP on ring E forms a stop to limit the movement of the Volvo in opening.

The two pistons are united to ouch other by on interposed connection in the casing A, and they are advantageously mode in one piece of metal. It is olso ain advantage to make the connection 1) hollow, with side openings d for ingress of the cold return gas to be compressed and with the wells of sold connection, enproxiinetely at least, in line with the wells of the hollow or trunk pie tons D.

The pistons D are operated by means of rods l) reciprocating endwide in lateral stuil in hoxcs F at one end of the casing A. With the obiect of effecting this arrangement the cesin A is made of larger diameter then the cylin ers interconnected. thereby, the ex" tension of the casing laterally beyond the cylinder A giving room outside said cylinder for the piston rods D", Figs. 1 end 5.- As shown in Fig. 5, they are connected at their outer ends with the cross-heed D? for receiving motion from u steomengine ,or other op eretingwinotor. (Not shown.)

The pistou rods D ore connected with the pistons U in.'de the casing A by menus oi the radial urine D on the interposed connection ll.

When the piston-rods I) are reciprocuted, they reciprocate the pistons Di end the inter- 'posed connection D, so that at the inward is sucked directly from easing A (wherein it surrounds the said parts) into the corresponding cylinder through the openings (2 and the interiors of hollow eonnectionD and hollow piston D oust the suctio11-vclve .il i l and on the outwurd piston movement the gun in said cylinder A or B is compressed end An external; flunge l) on the valve seats it on internal shoulder on the piston. and the movement of each piston D the'cold return IllCl one or other of the nozzles A B atv each 1110-' tion of the pistons D and their interposed connection D in, each direction. The cylinders A B are also each of them single stage, receiving the cold return gas directly from the casing A and delivering it after one coin pression to the corresponding nozzle A or Thus compression in each half of each reciprocation is eli'ected bypiston-rods D and pistons D and interposed connection D,which are all of them kept at a moderate uniform low temperature by the extended contact of the cold return gas of easing A with the surfaces of said parts. Moreover, the How of the return from casing A into each of the cylinders tends to carry into each of them the luor'cant which the endwise reciprocation of the rods D tends to carry into the casing A from the stuilingboxes F". The compressor is thus economical of lubrication as well as of manufacture. it is Well adapted to run at high speed in consequence of the balance of moving parts united with their uniform moderate low temperature. It is strong and not liable to get out of order.

The particular construction of the connection D, integral with the pistons D and hollow with side openings and with walls, approximately at least, in line with the walls of the hollow or trunk pistons, furnishes great rigidity and economy of manufacture along with a direct exposure of extended surfaces to the cold return gas and an uninterrupted conduction oi heat between the pistons and inter-nosed connection, and this articular construction is regarded as a specie improvement, which is narticularly pointed out and claimed an element in the third of the hereinafter-written claims.

The machine may be worked in an 11 right position or variously inclined instead OI horizontal. The springs of the valves could be given more force when they oppose and less when they coo-ct with gravity.

I claim asiny invention or discovery- 1. A double-acting gas-compressor, composed of two tandem single-acting singlestage co1nprcssor-cylinders, each having a delivery-valve at its outer end, a gas-tight casing of larger diameter connecting the adjacent inner ends of the cylinders, a returninletto the casing, two connected hollow trunk-pistons working in the respective cylinders, each such piston oarrving a suction valve and apertured to aim coniniuniem tion between the casing and the valve, radialv arms on the pistons, and piston-rods oonnected to the arms and passing through lat eral smiling-boxes at one end of the casing, whereby the cylinders, pistons and piston" rodsa-re kept at a moderate uniform low tempcrature. I

2. A double-acting gascornpressor, cornposcd of a gas-tight casing provided with a return-gas inlet, compressor-cylinders closed at their outer ends only and there provided with delivery-valves and arranged 'in line with each other at opposite ends of said casing with theirrespective open ends turned toward the center of said casing, pistons provided with suction-valves and united to each other by an interposed. connection in said casing, each of said pistons working in the corresponding compressiomcylinder and each ad- 'rnitting the gas through its interior directly into such cylinder from said czising, and piston-rods connected inside said casing with said pistons and reciprocating endw'ise in stufling-boxes on said casing, substantially as described.

3. A double-acting gas-compressor, composed of a gas-tight casing provided with a return-gas inlet, compressor-cylinders closed at their outer ends only and there provided with delivery-valves and arranged in line with each other at opposite ends of said casing with their respective open ends turned. toward the center of said casing, hollow trunk-pistons provided with suction-valves and united to each other byan interposed integrally-formed open sided. hollow connection in said casing, each of said pistons work ing in the. corresponding compression-cylinder and each admitting the as through its interior directly into such cylinder from said casing, and the walls of said hollow connection b'ein in line with the walls of said hollow trun ;-pistons, and piston-rods connected in side said casing With said pistons and recip rocating endwi'se in stuffing-boxes on said casing, substantially as described.

In testimony that I claim the invention above set forth I affix my signature in pics.

ence of two witnesses.

. LOUIS STERNE.

Witnesses:

It. WESTAOOTT, Fnnnn. L. RAND. 

